抑制系数对双小眼侧抑制现象的影响

Effect of inhibition coefficient on lateral inhibition phenomenon of interocular of two small eye

人类的视觉系统有着极为强大的信息分析与认知理解能力,是人类感知世界的重要途径.深入研究视觉系统的内在机理并对其建模,不仅有助于理解视觉感知的信息处理与传递方式,而且为实现基于视觉感知机制的计算模型贡献重要的理论基础与新思路.基于Taylor提出的侧抑制数学模型,通过改变抑制系数的振幅及空间散布程度改变抑制系数大小,利用Matlab(R2016b)仿真软件模拟抑制系数改变对双小眼间抑制的影响.模拟结果表明,改变抑制系数的振幅会影响被研究小眼脉冲发放频率的峰值,而改变抑制系数的空间散布程度则不会.无论改变抑制系数的哪个参量,抑制系数随双小眼间距离都先增大后减小再增大趋于定值,且最大值出现位置不变,两小眼距离超过6 mm时抑制系数几乎不变.

Human visual system has a very powerful ability of information analysis and cognitive understanding,and is an important way for human perception of the world.In-depth study of the internal mechanism of the visual system and its modeling will not only help to understand the information processing and transmission mode of visual perception,but also contribute important theoretical basis and new ideas for realizing the computational model based on visual perception mechanism.Based on the lateral inhibition mathematical model proposed by Taylor,the inhibition coefficient size was changed by changing the amplitude and spatial dispersion degree of the inhibition coefficient.Matlab(R2016b)simulation software was used to simulate the influence of the change of inhibition coefficient on the inhibition between binocular eyes.The simulation results show that changing the amplitude of the inhibition coefficient will affect the peak of the pulse frequency of the studied small eye,but changing the spatial spread of the inhibition coefficient will not.No matter which parameter of the inhibition coefficient is changed,the inhibition coefficient increases first,then decreases and then increases with the distance between the two small eyes,and the position of the maximum value remains unchanged,and the inhibition coefficient is almost unchanged when the distance between the two small eyes exceeds 6 mm.